Lub-dub Sound Of Heart Is Caused By | ((exclusive))

While many assume these sounds are the result of the heart muscle contracting, the truth is more mechanical. The "Lub": Closing of the Atrioventricular Valves

If the valves don’t close properly or are stiff, the laminar (smooth) flow of blood becomes turbulent. That turbulence creates a heart murmur . lub-dub sound of heart is caused by

Contrary to popular belief, the “lub-dub” is the sound of the heart muscle contracting. Instead, it is an acoustic event caused by the turbulent closing of the heart valves . While many assume these sounds are the result

Would you like more information on the cardiac cycle or heart anatomy? Contrary to popular belief, the “lub-dub” is the

The sudden closure of these semilunar valves creates the crisp "dub" sound, signaling that the heart has finished a beat and is preparing for the next cycle. Why the Sound Matters

The "lub" occurs at the beginning of —the phase where the heart's lower chambers (ventricles) contract to push blood out to the body and lungs. As the ventricles squeeze, the pressure inside them rises sharply. To prevent blood from flowing backward into the upper chambers (atria), two valves snap shut: The Mitral Valve: Located on the left side. The Tricuspid Valve: Located on the right side.

Here is the breakdown of what creates each syllable.